12809764540 has 24 divisors (see below), whose sum is σ = 27341500032. Its totient is φ = 5039906880.

The previous prime is 12809764531. The next prime is 12809764553. The reversal of 12809764540 is 4546790821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5248684 + ... + 5251123.

It is an arithmetic number, because the mean of its divisors is an integer number (1139229168).

Almost surely, 2^12809764540 is an apocalyptic number.

12809764540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12809764540 is an abundant number, since it is smaller than the sum of its proper divisors (14531735492).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12809764540 is a wasteful number, since it uses less digits than its factorization.

12809764540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10499877 (or 10499875 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 12809764540 in words is "twelve billion, eight hundred nine million, seven hundred sixty-four thousand, five hundred forty".